Shell for liquid-cooled permanent magnet synchronous motor and liquid-cooled permanent magnet synchronous motor

Abstract

The utility model discloses a shell for a liquid-cooled permanent magnet synchronous motor and the liquid-cooled permanent magnet synchronous motor. The shell comprises a front end cover, a rear end cover, and a liquid cooling sleeve and a shell which are matched with each other; a plurality of separation strips are arranged on the peripheral surface of the liquid cooling sleeve at intervals, and a cavity between the shell and the liquid cooling sleeve is separated into a circuitous flow channel; a liquid inlet flow channel and a liquid outlet flow channel are arranged at the two ends of the circuitous flow channel respectively, and the liquid inlet flow channel and the liquid outlet flow channel are separated through a barrier strip; and a liquid inlet and a liquid outlet are formed in the rear end cover and are respectively communicated with the liquid inlet flow channel and the liquid outlet flow channel. When the motor is used, cooling liquid is introduced into the cavity between the shell and the liquid cooling sleeve for heat dissipation, so that the temperature rise of the motor is controlled, and the service life of the motor and the service life of the permanent magnet are prolonged; and the cavity is separated by the separation strips and the barrier strips to form a specific flow channel layout, so that the whole liquid cooling cavity can be filled with the cooling liquid, the heat exchange uniformity is high, and local high temperature in the motor is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to liquid cooling type permanent magnet synchronous motor with casing and liquid cooling type permanent magnet synchronous motor. BACKGROUND

[0002] Permanent magnet synchronous motor (PMSM) is a kind of motor using permanent magnet to provide magnetic field, mainly by casing, rotor and stator arranged in casing are formed, and rotor is installed with permanent magnet. Permanent magnet synchronous motor has the advantages of small size, high efficiency, high power factor, low maintenance requirement, etc., and has been widely used in industrial automation, electric vehicle, aerospace and other fields.

[0003] Permanent magnet synchronous motor works, will produce certain heat, if heat accumulates in the motor interior, will make the temperature of motor rises, thereby influence the performance and life of motor, even can cause motor burn. In order to be able to heat in time, manufacturer usually sets up heat dissipation fan at the non shaft extension end of motor;During the operation of motor, heat dissipation fan will rotate synchronously with the rotating shaft of motor, thereby accelerates the air circulation in the motor, reaches the purpose of heat dissipation. However, heat dissipation fan is easy to produce vibration and noise in the process of running, influence working environment, in addition, gas flow is easy to wrap up the impurities in the motor, although the motor is provided with mesh cover, can play certain filtering effect, but mesh cover needs to be cleaned and replaced after using for a period of time, otherwise mesh hole is easy to cause the heat dissipation function of motor to decline when being blocked, and the mesh cover cleaned, still needs to be aired and so on, at this time, it is more troublesome to operate. UTILITARIAN CONTENT

[0004] The utility model provides a kind of liquid cooling type permanent magnet synchronous motor with casing to overcome above-mentioned problems existing in prior art.The liquid cooling type permanent magnet synchronous motor with casing of the utility model includes front end cover, rear end cover and mutually matched liquid cooling sleeve and shell, liquid cooling cavity is formed between liquid cooling sleeve and shell, and inlet and outlet are correspondingly provided on rear end cover, when motor is used, cooling liquid can be passed into liquid cooling cavity to dissipate heat, to control the temperature rise of motor, prolong the service life of motor and permanent magnet;In addition, liquid cooling cavity is separated by partition strip and baffle, to form specific flow channel layout, so that cooling liquid can fill the entire liquid cooling cavity, heat exchange uniformity is high, so that local high temperature can be prevented in motor. Correspondingly, the utility model further provides a kind of liquid cooling type permanent magnet synchronous motor equipped with the above-mentioned casing.

[0005] For the casing, the technical scheme of the application is:

[0006] The liquid-cooled permanent magnet synchronous motor shell comprises a base, a front end cover and a rear end cover arranged at two ends of the base, a wiring box arranged at the top of the base, and bottom feet arranged at both sides of the bottom of the base, wherein the base comprises a liquid-cooled sleeve and an outer shell sleeved outside the liquid-cooled sleeve, and the two ends of the outer shell are sealingly connected with the two ends of the liquid-cooled sleeve; a plurality of partition strips are arranged on the outer circumferential surface of the liquid-cooled sleeve at intervals, and the cavity between the outer shell and the liquid-cooled sleeve is divided into a circuitous flow channel; the two ends of the circuitous flow channel are respectively provided with an inlet flow channel and an outlet flow channel; the inlet flow channel and the outlet flow channel are separated by a baffle; and the rear end cover is provided with an inlet port and an outlet port, which are respectively connected with the inlet flow channel and the outlet flow channel.

[0007] Compared with the prior art, the liquid-cooled permanent magnet synchronous motor shell comprises a front end cover, a rear end cover, and a liquid-cooled sleeve and an outer shell matched with each other, and a liquid-cooled cavity is formed between the liquid-cooled sleeve and the outer shell; when the motor is used, cooling water can be fed into the liquid-cooled cavity to dissipate heat, so as to control the temperature rise of the motor and prolong the service life of the motor and the permanent magnet; in addition, the inlet and outlet ports are arranged on the rear end cover, and the assembly with an external cooling liquid circulating system is convenient; in addition, the liquid-cooled cavity is separated into a circuitous flow channel by the partition strips, so that the flow path of the cooling liquid can be changed, the flow time of the cooling liquid is increased, heat exchange is more sufficient, and the heat exchange efficiency is improved; in addition, the inlet and outlet flow channels at the two ends of the circuitous flow channel are separated by the baffle, so that the cooling liquid can only flow in one direction, so that the entire liquid-cooled cavity can be filled, the heat exchange uniformity is high, and local high temperature in the motor is avoided.

[0008] As an optimization, in the aforementioned liquid-cooled permanent magnet synchronous motor shell, the two ends of the baffle extend to the end edges of the liquid-cooled sleeve; the partition strips comprise A partition strips and B partition strips which are arranged at intervals; the front end of the A partition strip and the rear end of the B partition strip extend to the end edges of the liquid-cooled sleeve, and the rear end of the A partition strip and the front end of the B partition strip are spaced from the end edges of the liquid-cooled sleeve. At this time, the structure is simple and convenient to manufacture.

[0009] As an optimization, in the aforementioned liquid-cooled permanent magnet synchronous motor shell, an annular boss is arranged on the inner wall of the outer shell at a position close to the rear end; the rear end surface of the liquid-cooled sleeve abuts against the annular boss, and the front end surface of the liquid-cooled sleeve is flush with the front end surface of the outer shell. At this time, the structure design is reasonable and the assembly is convenient.

[0010] As an optimization, in the aforementioned liquid-cooled permanent magnet synchronous motor shell, the two ends of the liquid-cooled sleeve are fixed with the two ends of the outer shell by welding. At this time, the connection structure is simple and easy to implement, and the sealing performance is good. Specifically, two A inclined surfaces are arranged on the two end surfaces of the liquid-cooled sleeve, and corresponding B inclined surfaces are arranged on the annular boss and the front end surface of the outer shell, the A inclined surfaces and the B inclined surfaces are matched with each other to form a welding groove.

[0011] As an optimization, in the aforementioned liquid-cooled permanent magnet synchronous motor shell, the front end cover is fixed with the liquid cooling sleeve through threaded connection, and the rear end cover is fixed with the shell through threaded connection. At this time, the connection firmness is high, and the disassembly and assembly are convenient, facilitating later maintenance and replacement. Further, the front end cover is provided with an A annular seat embedded in the liquid cooling sleeve, and a sealing ring is arranged between the A annular seat and the liquid cooling sleeve; the rear end cover is provided with a B annular seat embedded in the shell, and a sealing ring is arranged between the B annular seat and the shell. Therefore, the sealing between the front end cover and the liquid cooling sleeve and the sealing between the rear end cover and the shell can be ensured.

[0012] As an optimization, in the aforementioned liquid-cooled permanent magnet synchronous motor shell, the liquid inlet and the liquid outlet are each provided with a pipe joint; the pipe joint is connected with the shell through threaded connection. In use, the inlet and outlet pipes of the external cooling liquid circulating system can be directly connected with the corresponding pipe joints, without the need for additional corresponding connecting components, and the operation is more convenient.

[0013] For the motor, the technical scheme of the present application is:

[0014] The liquid-cooled permanent magnet synchronous motor comprises a shell, and a stator and a rotor arranged in the shell; the shell is the aforementioned liquid-cooled permanent magnet synchronous motor shell of the present application.

[0015] Compared with the prior art, the liquid-cooled permanent magnet synchronous motor of the present application is provided with a shell having a specific structure, and in use, the shell can be cooled by circulating cooling liquid to control the temperature rise of the motor and prolong the service life of the motor and the permanent magnet, and the shell has a reasonable flow channel layout, which can optimize the flow path of the cooling liquid, improve the heat exchange efficiency, and further ensure the uniform distribution of the internal temperature of the motor. In addition, the liquid cooling of the motor of the present application replaces air cooling, and the cooling fan and the mesh cover are cancelled, so that the length of the motor can be shortened, the occupied space can be reduced, and the liquid cooling system is relatively quiet during operation, which is suitable for environments sensitive to noise.

[0016] As an optimization, in the aforementioned liquid-cooled permanent magnet synchronous motor, a temperature sensor is arranged in the shell. Therefore, the temperature inside the shell can be detected by the temperature sensor, and the water pump of the external cooling liquid circulating system can be linked to adjust the flow of the cooling liquid in real time, so as to realize precise temperature control and avoid performance degradation or damage of the motor caused by overheating. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the liquid-cooled permanent magnet synchronous motor shell of the present application;

[0018] Figure 2is a schematic view of a cross section of a base in the application;

[0019] Figure 3 is a schematic view of a structure of a liquid cooling sleeve in an embodiment of the application;

[0020] Figure 4 is a schematic view of a structure of an outer shell in an embodiment of the application;

[0021] Figure 5 is a schematic view of a cross section of a housing in an embodiment of the application;

[0022] Figure 6 is a schematic view of a structure of a liquid-cooled permanent magnet synchronous motor in an embodiment of the application.

[0023] The marks in the drawings are: 1-base, 11-liquid cooling sleeve, 12-outer shell, 121-annular boss, 13-separation strip, 131-A separation strip, 132-B separation strip, 14-stop bar, 15-bottom foot, 101-circuitous flow channel, 102-liquid inlet channel, 103-liquid outlet channel, 104-welding groove; 2-front end cover, 21-A annular seat; 3-rear end cover, 31-B annular seat, 301-liquid inlet, 302-liquid outlet; 4-junction box; 5-pipe joint; 6-stator; 7-rotor; 8-oil seal; 9-cover plate. DETAILED DESCRIPTION

[0024] The application will be further described below in conjunction with the drawings and embodiments, but not as a basis for limiting the application.

[0025] Referring to Figure 1 and Figure 2 , the liquid-cooled permanent magnet synchronous motor housing in the application comprises a base 1, and a front end cover 2 and a rear end cover 3 arranged at both ends of the base 1; the top of the base 1 is provided with a junction box 4, and the bottom of the base 1 is provided with a bottom foot 15 on both sides; the base 1 comprises a liquid cooling sleeve 11 and an outer shell 12 sleeved outside the liquid cooling sleeve 11, and both ends of the outer shell 12 are sealingly connected with both ends of the liquid cooling sleeve 11; a plurality of separation strips 13 are arranged on the outer circumferential surface of the liquid cooling sleeve 11 at intervals, so as to separate the cavity between the outer shell 12 and the liquid cooling sleeve 11 into circuitous flow channels 101; the two ends of the circuitous flow channels 101 are respectively provided with a liquid inlet channel 102 and a liquid outlet channel 103; the liquid inlet channel 102 and the liquid outlet channel 103 are separated by a stop bar 14; the rear end cover 3 is provided with a liquid inlet 301 and a liquid outlet 302, which are respectively connected with the liquid inlet channel 102 and the liquid outlet channel 103.

[0026] Embodiment:

[0027] Referring to Figure 3In the embodiment, the two ends of the blocking strip 14 extend to the end edges of the liquid cooling sleeve 11; the partition strip 13 comprises A partition strips 131 and B partition strips 132 which are spaced and staggered along the circumference of the liquid cooling sleeve 11; the front end of the A partition strip 131 and the rear end of the B partition strip 132 extend to the end edges of the liquid cooling sleeve 11, and the rear end of the A partition strip 131 and the front end of the B partition strip 132 leave a passage with the end edges of the liquid cooling sleeve 11.

[0028] Referring to Figure 4 In the embodiment, the inner wall of the shell 12 is provided with an annular boss 121 near the rear end; the rear end face of the liquid cooling sleeve 11 abuts against the annular boss 121, and the front end face is flush with the front end face of the shell 12. At this time, the inside of the shell 12 is divided by the annular boss 121 into a part of space for mounting the stator and rotor, and the heat generated by the stator and rotor is dissipated by the external liquid cooling sleeve 11, and another part of space for arranging the motor coil, which facilitates the connection of the coil to the junction box 4, and no interference occurs between the components.

[0029] In the embodiment, the two ends of the liquid cooling sleeve 11 are fixed with the two ends of the shell 12 by welding; the front and rear end faces of the liquid cooling sleeve 11 are respectively provided with A inclined faces, and correspondingly, the annular boss 121 and the front end face of the shell 12 are respectively provided with B inclined faces, the A inclined faces and the B inclined faces cooperate to form a welding groove 104.

[0030] In the embodiment, the front end cover 2 is fixed with the liquid cooling sleeve 11 by bolt connection, and the rear end cover 3 is fixed with the shell 12 by bolt connection. At this time, the connection is firm, and the disassembly and assembly are convenient, which facilitates the later maintenance and replacement.

[0031] Further, the front end cover 2 is provided with an A annular seat 21 which is embedded in the liquid cooling sleeve 11, and a sealing ring is arranged between the A annular seat 21 and the liquid cooling sleeve 11; the rear end cover 3 is provided with a B annular seat 31 which is embedded in the shell 12, and a sealing ring is arranged between the B annular seat 31 and the shell 12.

[0032] Referring to Figure 5 In the embodiment, the liquid inlet 301 and the liquid outlet 302 are respectively provided with a pipe joint 5; the pipe joint 5 is connected with the shell 12 by screw thread.

[0033] In use, the inlet and outlet pipes of the external cooling liquid circulating system are respectively connected with the pipe joints 5 on the liquid inlet 301 and the liquid outlet 302; then the circulating system is started to make the cooling liquid circulate in the cavity between the shell 12 and the liquid cooling sleeve 11 (the cooling liquid flows in from the liquid inlet 301 and flows out from the liquid outlet 302), so as to cool the motor.

[0034] As a specific application of the shell for liquid-cooled permanent magnet synchronous motor of the present application:

[0035] Referring to Figure 6 , the liquid-cooled permanent magnet synchronous motor comprises a shell, a stator 6 and a rotor 7 arranged in the shell; the rotor 7 comprises a rotor core and a rotating shaft arranged in the middle of the rotor core; the shell is the aforementioned shell for liquid-cooled permanent magnet synchronous motor of the present application; the two ends of the rotating shaft respectively pass through the front end cover 2 and the rear end cover 3 of the shell; the connection between the front end cover 2 and the rotating shaft is provided with an oil seal 8; the rear end cover 3 is concave, and a cover plate 9 is fixed on the rear end face of the rear end cover 3 (the oil seal 8 and the cover plate 9 can prevent water and dust); the top of the front end cover 2 and the rear end cover 3 is respectively provided with a lifting ring on both sides; the shell is internally provided with a temperature sensor.

[0036] Of course, the shell with the specific structure in the present application is not limited to the above-mentioned practical application, and can also be used in other types of motors.

[0037] Based on the disclosure of the present application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description or / and specific embodiments (including examples) without violating the essential elements of the utility model, to form other technical solutions within the scope of protection of the present application.

Claims

1. A liquid-cooled permanent magnet synchronous motor housing, comprising a base (1), a front end cover (2) and a rear end cover (3) arranged at both ends of the base (1); the top of the base (1) is provided with a junction box (4), and the bottom of the base (1) is provided with bottom feet (15); characterized in that: The stator (1) comprises a liquid cooling sleeve (11) and a shell (12) sleeved outside the liquid cooling sleeve (11), and two ends of the shell (12) are sealingly connected with two ends of the liquid cooling sleeve (11); a plurality of partition strips (13) are arranged on the outer circumferential surface of the liquid cooling sleeve (11) at intervals, so as to divide the cavity between the shell (12) and the liquid cooling sleeve (11) to form a circuitous flow channel (101); the two ends of the circuitous flow channel (101) are respectively provided with an inlet flow channel (102) and an outlet flow channel (103); the inlet flow channel (102) and the outlet flow channel (103) are separated by a baffle (14); the rear end cover (3) is provided with an inlet port (301) and an outlet port (302) which are respectively connected with the inlet flow channel (102) and the outlet flow channel (103).

2. The liquid-cooled permanent magnet synchronous motor housing according to claim 1, characterized by: The two ends of the baffle (14) extend to the end edges of the liquid cooling sleeve (11); the partition strips (13) comprise A partition strips (131) and B partition strips (132) which are arranged at intervals and staggered; the front end of the A partition strip (131) and the rear end of the B partition strip (132) extend to the end edges of the liquid cooling sleeve (11), and the rear end of the A partition strip (131) and the front end of the B partition strip (132) leave a passage with the end edges of the liquid cooling sleeve (11).

3. The liquid-cooled permanent magnet synchronous motor housing according to claim 1, characterized by: An annular boss (121) is arranged on the inner wall of the shell (12) at a position close to the rear end; the rear end surface of the liquid cooling sleeve (11) abuts against the annular boss (121), and the front end surface is flush with the front end surface of the shell (12).

4. The liquid-cooled permanent magnet synchronous motor housing according to claim 3, characterized by: The two ends of the liquid cooling sleeve (11) and the two ends of the shell (12) are fixed by welding.

5. The liquid-cooled permanent magnet synchronous motor housing according to claim 4, characterized by: A and B inclined surfaces are respectively arranged on the front and rear end surfaces of the liquid cooling sleeve (11) and the front end surface of the shell (12), and the A inclined surface and the B inclined surface are matched to form a welding groove (104).

6. The liquid-cooled permanent magnet synchronous motor housing according to claim 4, characterized by: The front end cover (2) and the liquid cooling sleeve (11) are fixed by threaded connection, and the rear end cover (3) and the shell (12) are fixed by threaded connection.

7. The liquid-cooled permanent magnet synchronous motor housing according to claim 6, characterized by: An A annular seat (21) is arranged on the front end cover (2), the A annular seat (21) is embedded in the liquid cooling sleeve (11), and a sealing ring is arranged between the A annular seat (21) and the liquid cooling sleeve (11); a B annular seat (31) is arranged on the rear end cover (3), the B annular seat (31) is embedded in the shell (12), and a sealing ring is arranged between the B annular seat (31) and the shell (12).

8. The liquid-cooled permanent magnet synchronous motor housing according to claim 1, characterized by: A pipeline joint (5) is arranged at each of the inlet port (301) and the outlet port (302); the pipeline joint (5) is connected with the shell (12) by threaded connection.

9. Liquid-cooled permanent magnet synchronous motor comprising a housing, and a stator (6) and a rotor (7) arranged in the housing; characterized in that: The shell is the shell of the liquid-cooled permanent magnet synchronous motor according to claim 1.

10. The liquid-cooled permanent magnet synchronous motor according to claim 9, characterized by: A temperature sensor is arranged in the shell.

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